Dental pliers



AugfZG, 1958 J. FuEs-r 2,348,812

DENTAL PLYERS Filed July l0, 19.57 2 Sheets-Sheet 1 COMPRESSED AIR CYLINDER INVENTOR.

JOHN FUEST J. FUEsT DENTAL PLYERS Aug. 26, 1958 2 Sheets-Sheet 2 Filed July 10, 1957 INVENTOR. JOH N FU EST John FtiestaGleridtril'eLN.I Y. Apphcaeohoiy 10,1951.. sriiuo.. 1shop 6 claimt.;y (c1. sz-wen 10 This. .im/annali. relnmslo. .dental .fof eerzs. It iS .nn nbieef of thehresent invention ferroyirledenr. tel forceps equippeslmithen ,pressnre mechanism forA the PllfPOSenf movmaahemmer-.lllse .detent .in.; th.e aria-1 ping .forceps whereby when thearpressnre. vnlye...iseetn: amd by 'the .dentist the detem...w.il.1he.foreed downwardly. against .the tension. o f shrines., nnenpon.. release of .the ValY.lhn,.SPfnas will .knoekihe @etant .nawardlyegeinst the tooth which is to be errtractecl.`-

Otherohie'efs of. the Presentlinventon. meronrorisle a. dental. formas. hearing .the ehm/e..ohieetin'minn.wheh's nf simple .eonsnnenom is inexpensive.. has. a mmimnm .nnmber of` parts,.is..ensy tonseand eheient in operation. For.fmtheneompmhensan.of .mami/ent n. and .of the. @biente nndedvnnmses .thereehreerena eghad, .1o. the following'descriptionland accompanyingvdrawingsh and. .to iheppended ...the varionsJnoYel femmes, .off thenv tionme, more. .P mtinnlmly-setforth; In tlm* @Commenting drawings..forming.n..materialnmt Fia 'l is n hesaesnveyiew nf. .n dentalforoeps emhodxf., ing the .fenmresof the Ypresent in? tion..

Fig.v 2isy aflongitudf al sectional ,viewrv talennalong the linezzafrigji.'

"Fig- 3 is' al fragmentary. verdeel.,.seotionnhvient felgen Pig-.4 is .a fragmentary View. simi1ar..toFig-.2.hntshnua ins .the .valve in an. open resilient..

Fla Sie' @vertical seonnnnl.- iewnlsen. nlonathelmes sgofrtgzp 1 Fig.` 6. .is vertical. seotionnl. view tnlssn. nlonaihe line @-6. cf Pig., 5;

"F.e- Tis al view. .similar .to Fig 5, .but shnuinatheposif. tionof thehhmmer-.lile de f 'fr Fia. 8 isfn vertical semanal.. vieu .mhenalona the.. line. s-sbr'rig. 7.

Referrinanoumnre .in defnilnnthe. n..r.nwinas,thereis. showgn dental. fomensirefered.tn eolleetitelyas-19, a d. including a' pair of handle portions 11` and :12,. sirbstan;n tiallyasillustratedl.Y

"The handle portionll-,is-.intearnlly formed .withaiavt 13 .while the handle p portion 11 integrally l formed ithi a jawy 14', the ends lof .the jawsY 413.. and14 beingdprdovided. along their naher. enses. .Wiehl ettenlsions.. 15.4. els-n.11@ ref.' spectively. The handle portionnlZ'adjaent ythe jaw 13 60 provided with e. nehmen; Cimnlnrrnrtion. llahatinaaj Circuler'. bore. 18- (Fia '2), the h'nndl. .pnftinalheina providedwitha 'cutonf-19.belalhal--nadfh 911.171 to .pvotallyf lreceive. .a dmesnondinsly. ain? .1.. nella?. portion 20.pro`v`,fid'e .1 yinthe hadleportnn .lll The h ndle.. portion.11.-isalso[proyidedwthaen '1 ceivesthe .attenedf porti nl fr" d portion. 2

when the alve is .op

heling monden-with. azboreallgnei-Wfh the horefflaot the attened portidnr17. I"

The enened Portion. 17 and .20..nf.f.fl.1ahanslle. Pertinns ice integrally formed circular ilange 23 at one end and having internally threaded bore 24 at the other end (Fig. 3). A circular ange 25 is integrally formed with an externally threaded portion 26 adaptedl to be screwed into the internally threaded opening 24 whereby to pivotally connect the handle portions 11 and 12 together; as will be' obvious.

The cylindrical member 22 is also integrally formed with.V a rearwardly extending portion 27 which terminates in a transverse hollow cylindrical portion 23, then side ci cylindrical portion 28 remote fromthe portion 27 .being integrally formed with an extension 29 having an externally threaded end 30. An air pressure line 31is connected to the externally threaded end of theA extension 29 by means of an interuallythreadedl adaptor 32,the'otherV end ,of the airline 31 being counected'to a cylinder Yof compressed air, not shown. The outer lsurface of the adaptor 32 is knurled to facilitate connection of theA air line 31 to the extension 29. I

A piston valve 33 is slidable within the hollow cylinder 28. and is integrally formed with a piston rodV or handle 3.4 extending outwardly through an opening at one end of ,the cylinder 28 and terminating in a button 355 the 'piston 33 being normally urged into the positionof Fig. 2 by means of a compression spring 36. The piston'33 may be pushed .to the position of Fig. 4 against'the action of .spring-36, by meansy of the thumb or other'iinger 37 (Fig-4);.- The handle 12, it Wlllbe noted, is provided withan opening 33 which. receives the handle '34there-Y through. l., .v i.

The extension 39 is. provided withan internal bore 39' connecting the air line 31 with ehe interior ofthe hollow cylinder 2,8,- the piston 33 havingr abo're 40 adapted to be aligned with the bore 39 (Fig. 4). The piston 33 is also provided withfan L-shaped bore41:whichfcommunicates with au outlet opening 42 provided in the 'portion' of cylinder ZScontaining spring 36..' e' f The 'cylindrical member 22 is provided .with an internal bore 43 which communicates with. the interior of' hollow' cylindricalmember 28 by means of la' longitudinal' bore 44- provided in the extension 27 (Fig. 3),"the rear end of the bore 44 being adapted to be aligned with" the bore 4Q (Fig. 4) when the valve is pushed 'or opened and adapted Lto be aligned with the bore 41 when the'valve'is at one end 'and open onto bore 43 of the cylindrical menig' ber 22at the other ends, the cylindrical 'member 22 havn ing a bore 49 communicating with bore 47 and a boreil communicating with bore 4S (Fig. 3). vT he ends offbores 4'Z'and 48,. it will be noted, are enlarged adjacent the cylindricalmember 22 to permit the angular displacement of the jaws 13 and 14 Arelative to each 'othernecessary to grip the tooth while still permitting the"bore`s"47 and 48 to be in contact with the bores'49 'and Si), as willV be obvious. Thus, upon pressing the button 35, compressed .air will be delivered to the cutouts 45 and 46'( A pair of hollow rectangular housings 51 and 52 are positioned within the cutouts 4S and 46,' the' housing 5 1 beingA secured in position by means of a ilange 53'and screws 54, while the housing 52 is secured in position by means of ja flange 55 and screws 56. The bottom wallsy of'thenhrousing 51 and 52 are also secured within Vthe cut` outs 45y and 46. The housings 51 and 52 are,` when positionedagainst the cutouts 45 and 46, entirely closed and communicate with the bores 47iand 48by means ofpopenings 59 and 66, respectively.

to the bore43 of -cylin-` Vvbers 67 upwardly to extract tooth 69.

that the top walls of the housings 61 and 62 serve asv A cup-shaped member 61 is positioned within the housing 51 and is adapted for vertical movement therewithin, while a second cup-shaped member 62 is similarly positioned within the housing 52, the top wall of the housings 51 and 52 providing a stop for each of these cup- Vshaped members when the latter are inthe raised positions of Fig. 6. The undersurface of each of the cupshaped members 61 and 62 is integrallyforrned with a-Y pair of longitudinally spaced hubs 63 which have securedtherewithin a pair of Avertical shafts 64, the lower endsofV the shafts 64 passing downwardly through a pair of longitudinally spaced openings' 65 provided in the bottomv walls ofeach of the housings 51 and52. Compression springs 66 sleeve each of the shafts 64 intermediate the hubsr63 and the bottom walls of the housings 51 and? 52, these springs serving to normally retain the cupshaped members 61 and 62 in the raised positions of Y terminates in an .enlargement 72 adapted to overlie the openings 59k and 60, as shown in Fig. 6. The downward-` ly extending portion 70, the extension 71 and the terminal 72 are hollow, permitting compressed air from the openings 59 and 66 to be conducted into the cup-shaped members 61 and 62. VIt will be noted that by meansVA of the enlarged terminalsk 72, the compressed air will be conducted into the cup-shaped'members 61 and 62 whenthe latter-,are both in the'upper and lower positions (see Figs. 6 and 8).

VIn' operation, the pushpbutton 35 will be pressed inwardly to open the valve and to permit the compressed air to ow from air line 31 into the housings 61 and 62 and thence through the portions 72, 71 and 70 upwardly into the cup-shaped members 61 and 62, forcing the latter downwardly in piston-like action against the action of springs. 66.V This will lower the gripper members 67 to the position of Figs. 7 and 8, whereupon they are brought into tensional engagement with the base of the tooth 69 by squeezing handles 11 and 12.V Upon release of the button 35, the lspring-345 will disconnect the air line 31 and will permit the compressed air within the cup-shaped members 61 and 62 to escape rearwardly Y 'through the L-shaped bore-31 of the piston 33 and then outwardly of cylinder 28 through opening 42, thus permitting the springs 66 to snap the cup-shaped members 61 and 62 upwardly and thereby snapping the gripper memlt will be noted stops for the cup-shaped members 61 and 62.

WhileI have illustrated-and described the preferred embodiment of-my invention, it is to be understood-that I do not limit myself tothe precise construction herein disclosed and the right is reserved to all changes and modifications coming within the scope ofthe invention' as defined in the appended claims.

VHaving thus described my invention, what I claim as new, and desire to secure by United States Letters Patent is:

1. A dental forceps comprising a pair of handles pivot-VV 4 whereby to move said piston-like members downwardly against the action of said spring means.

2. A dental forceps comprising a pair of handles pivoted together, each of said handles having connected thereto a jaw, the outer ends of each of said jaws ybeing hollow, a piston-like member slidable within each of said hollow ends, spring means for normally/.retaining said piston-like members in a raised position, external tooth gripping members at the bottom of each of said jaws and connected to saidypiston-likejmembers, and means for supplying compressed air toeach of said hollow jaw ends whereby to move saidpiston-like members downwardly against the actionnof said'l springl means, said last-mentioned means comprising a hollow cylindrical member forming a bearing for pivotally connecting said handles together, a hollow extension extending rearwardly from said cylindrical member and communicating with the interior thereof, a hollow transverse 'cylindrical member at the endof said hollow extension, means for connecting the side of said transverse cylindrical member remote from said extension toV a compressed air line,l a piston within said hollow transverse shaft, said piston having ay rst bore adapted to connect-'said extension with the'air line, said pistonl having a second substantially L-Shaped boreadapted to connect said extension with the interior of said transverse cylinder, said transverse cylinder `having an opening, spring'means for urging 'said firstbore of said piston out of alignment -Vwith said extension, a laterally extending rod connected to said piston, andan enlarged button'on the end of' said rod, said-rodfpassing through an opening provided in one of said handles, said jaws having longitudinally extending bores, said first cylindrical member having a pair Vof openings connecting the interior thereof with said jawbores. i

3. A dental forceps-comprising a pair of substantially S-shaped members, each of said members having a jawk portion and a handle portionv connectedby a attened portion, means for pivotally connecting saidV flattened portions, eachI of said jaws atthe endsv thereof on adjacent faces having cutout portions, a pair of closed rectangular housings securedwwithins'a'id cutout portions, a pairof lsubstantially cup-shaped members within eachiof said housings, said cup-shaped members vbeing open on the top and adapted for sliding movement within said housings, downwardly extending members connected to thel bottom of each of said cuprshaped members extenddownwardly extending members and'adaptedto retain said cup-shaped members in an upper 'position with said gripping members retracted, and meansv for supplying compressed air to said cup-shaped members whereby to urge the same downwardly -against theaction of said spring means.

4. A dental forceps comprising a pairofsubstantially S-shaped members, each of said members having a jaw portion and a handleportionconnected'by a attened portion, means for pivotally; connectingf'said tiattened portions, each of said jaws at the ends" thereof on adjacent faces havingrcutout portions, a pair of closed rectangular housings secured within said Ycutout portions, Ya pair substantially cup-shapedlpmernbersk within each of said housings, said cup-shaped Ymembers being open on the top and adapted for sliding movement vwithin said housings, downwardly eXtendingQmembers 'connected to. the bottom of each of said'cup-shaped members extending downwardly` andslidably through the bottoms'of said housings, a pair of tooth-grippermernbers connected ,to

the bottoms of said downwardly extending ,'members, said gripper members being adapted when broughtl together to engage the base of a tooth, spring means surrounding Said 'downwardly' extending members and'Y adaptedtrire-l assente Ei U tain said cup-shaped members in an upper position with said gripping members retracted, means for supplying compressed air to said cup-slpaped members whereby to urge the same downwardly against the action of said spring means, said last-mentioned means comprising said ilattened portions having aligned bores, a cylindrical member within said aligned bores, said cylindrical member having a hollow bore, each of said jaws having a longitudinal bore extending from said housings to said cylindrical member, said cylindrical member having secondary bores communicating with said longitudinal jaw bores, each of said housings having an opening communicating with said longitudinal bores, a depending, hollow communicating at one end with the interior of said cup-shaped members and at the other end with said openings provided in said housings, and means for supplying compressed air to the interior bore of said cylindrical member.

5. A dental forceps comprising a pair of substantially S-shaped members, each of said members having a jaw portion and a handle portion connected by a flattened portion, means for pivotally connecting said attened portions, each of said jaws at the ends thereof on adjacent faces having cutout portions, a pair of closed rectangular housings secured within said cutout portions, a pair of substantially cup-shaped members within each of said housings, said cup-shaped members being open on the top and adapted for sliding movement within said housings, downwardly extending members connected to the bottom of each of said cup-shaped members extending downwardly and slidably through the bottoms of said housings, a pair of tooth gripper members connected to the bottoms of said downwardly extending members, said gripper members being adapted when brought together to engage the base of a tooth, spring means surrounding said downwardly extending members and adapted to retain said cup-shaped members in an upper position with said gripping members retracted, means for supplying compressed air to said cup-shaped members whereby to urge the same downwardly against the action u of said spring means, said last-mentioned means comprising said attened portions having aligned bores, a cylindrical member within said aligned bores, said cylindrical member having a hollow bore, each of said jaws having a longitudinal bore extending from said housings to said cylindrical member, said cylindrical member having secondary bores communicating with said longitudinal jaw bores, each of said housings having an opening communicating with said longitudinal bores, a depending, hollow member communicating at one end with the interior of said cup-shaped members and at the other end with said openings provided in said housings, means lfor supplying compressed air to the interior bore of said cylindrical member, said last-mentioned means comprising a hollow rearwardly extending portion connected to said irst cylindrical member, a transverse hollow cylindrical member at the end of said rearwardly extending member, a piston valve within said transverse cylindrical member, a hollow extension on said transverse cylindrical member, means for supplying compressed air to said extension, said valve having a rst bore adapted to connect said extension with said rearwardly extending portion, a spring intermediate said valve and one end of said transverse cylindrical member, said cylinder surrounding said spring having an outlet opening, said valve having a second substantially L-shaped bore adapted to connect said rearwardly extending portion with said outlet opening upon compression of said spring, and means for moving said piston against the action of said spring.

6. A dental forceps comprising a pair of substantially S-shaped members, each of said members having a jaw portion and a handle portion connected by a attened portion, means for pivotally connecting said dattened porv tions, each of said jaws at the ends thereof on adjacent faces having cutout portions, a pair of closed rectangular housings secured within said cutout portions, a pair of substantially cup-shaped members within each of said housings, said cup-shaped members being open on the top and adapted for sliding movement within said housings, downwardly extending members connected to the bottom of each of said cup-shaped members extending downwardly and slidably through the bottoms of said housings, a pair of tooth gripper members connected to the bottoms of said downwardly extending members, said gripper members being adapted when brought together to engage the base of a tooth, spring means surrounding said downwardly extending members and adapted to re tain said cup-shaped members in an upper position with said gripping members retracted, means for supplying compressed air to said cup-shaped members whereby to urge the same downwardly against the action of said spring means, said last-mentioned means comprising said ilattened portions having aligned bores, a cylindrical member within said aligned bores, said cylindrical member having a hollow bore, each of said jaws having a longitudinal bore extending from said housings to said cylindrieal member, said cylindrical member having secondary bores communicating with said longitudinal jaw bores, each of said housings having an opening communicating with said longitudinal bores, a depending, hollow member communicating at one end with the interior of said cup-shaped members and at the other end with said openings provided in said housings, means for supplying compressed air to the interior bore of said cylindrical member, said last-mentioned means comprising a hollow rearwardly extending portion connected to said first cylindrical member, a transverse hollow cylindrical member at the end of said rearwardly extending member, a piston valve within said transverse cylindrical member, a hollow extension on said transverse cylindrical member, means for supplying compressed air to said extension, said valve having a first bore adapted to connect said extension with said rearwardly extending portion, a spring intermediate said Valves and one end of said transverse cylindrical member, said cylinder surrounding said spring having an outlet opening. said valve having a second substantially L-shaped bore adapted to connect said rearwardly extending portion with said outlet opening upon compression of said spring, and means for moving said piston against the action of said spring, said means for connecting said extension to an air line comprising said extension being externally threaded and adapted to receive thereon an internally threaded adaptor connected to the air line, said means for moving said piston against the action of said spring comprising a piston rod extending outwardly and terminating in an e11- larged button, one of said handle portions having an opening receiving said piston rod therethrough.

References Cited in the le of this patent FOREIGN PATENTS 418,588 Great Britain Oct. 22, 1934 

